Mercurial > piecrust2

annotate piecrust/data/provider.py @ 3:f485ba500df3

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Gigantic change to basically make PieCrust 2 vaguely functional. - Serving works, with debug window. - Baking works, multi-threading, with dependency handling. - Various things not implemented yet.
author Ludovic Chabant <ludovic@chabant.com>
date Sun, 10 Aug 2014 23:43:16 -0700
parents
children 474c9882decf
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rev   line source
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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1 import time
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2 import itertools
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3 from piecrust.data.iterators import PageIterator
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4 from piecrust.sources.base import ArraySource
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5
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6
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7 class DataProvider(object):
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8 debug_render_dynamic = ['_debugRenderUserData']
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9 debug_render_invoke_dynamic = ['_debugRenderUserData']
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10
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11 def __init__(self, source, page, user_data):
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12 if source.app is not page.app:
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13 raise Exception("The given source and page don't belong to "
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14 "the same application.")
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15 self._source = source
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16 self._page = page
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17 self._user_data = user_data
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18
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19 def __getattr__(self, name):
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20 if self._user_data is not None:
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21 return self._user_data[name]
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22 raise AttributeError()
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23
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24 def __getitem__(self, name):
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25 if self._user_data is not None:
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26 return self._user_data[name]
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27 raise KeyError()
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28
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29 def _debugRenderUserData(self):
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30 if self._user_data:
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31 return self._user_data.keys()
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32 return []
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33
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34
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35 class CompositeDataProvider(object):
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36 def __init__(self, providers):
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37 self._providers = providers
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38
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39 def __getattr__(self, name):
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40 for p in self._providers:
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41 try:
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42 return getattr(p, name)
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43 except AttributeError:
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44 pass
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45 raise AttributeError()
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46
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47
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48 class IteratorDataProvider(DataProvider):
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49 PROVIDER_NAME = 'iterator'
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50
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51 debug_render_doc = """Provides a list of pages."""
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52
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53 def __init__(self, source, page, user_data):
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54 super(IteratorDataProvider, self).__init__(source, page, user_data)
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55 self._pages = PageIterator(source, current_page=page)
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56 self._pages._iter_event += self._onIteration
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57 self._ctx_set = False
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58
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59 def __len__(self):
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60 return len(self._pages)
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61
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62 def __getitem__(self, key):
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63 return self._pages[key]
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64
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65 def __iter__(self):
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66 return iter(self._pages)
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67
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68 def _onIteration(self):
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69 if not self._ctx_set:
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70 eis = self._page.app.env.exec_info_stack
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71 eis.current_page_info.render_ctx.used_source_names.add(
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72 self._source.name)
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73 self._ctx_set = True
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74
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75
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76 class BlogDataProvider(DataProvider):
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77 PROVIDER_NAME = 'blog'
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78
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79 debug_render_doc = """Provides a list of blog posts and yearly/monthly
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80 archives."""
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81 debug_render = ['posts', 'years', 'months']
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82 debug_render_dynamic = (['_debugRenderTaxonomies'] +
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83 DataProvider.debug_render_dynamic)
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84
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85 def __init__(self, source, page, user_data):
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86 super(BlogDataProvider, self).__init__(source, page, user_data)
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87 self._yearly = None
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88 self._monthly = None
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89 self._taxonomies = {}
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90 self._ctx_set = False
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91
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92 def __getattr__(self, name):
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93 if self._source.app.getTaxonomy(name) is not None:
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94 return self._buildTaxonomy(name)
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95 return super(BlogDataProvider, self).__getattr__(name)
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96
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97 @property
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98 def posts(self):
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99 it = PageIterator(self._source, current_page=self._page)
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100 it._iter_event += self._onIteration
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101 return it
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102
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103 @property
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104 def years(self):
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105 return self._buildYearlyArchive()
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106
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107 @property
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108 def months(self):
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109 return self._buildMonthlyArchive()
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110
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111 def _debugRenderTaxonomies(self):
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112 return [t.name for t in self._source.app.taxonomies]
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113
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114 def _buildYearlyArchive(self):
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115 if self._yearly is not None:
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116 return self._yearly
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117
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118 self._yearly = []
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119 for fac in self._source.getPageFactories():
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120 post = fac.buildPage()
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121 year = post.datetime.strftime('%Y')
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122
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123 posts_this_year = next(
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124 itertools.ifilter(lambda y: y.name == year, self._yearly),
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125 None)
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126 if posts_this_year is None:
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127 timestamp = time.mktime(
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128 (post.datetime.year, 1, 1, 0, 0, 0, 0, 0, -1))
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129 posts_this_year = BlogArchiveEntry(self._page, year, timestamp)
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130 self._yearly.append(posts_this_year)
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131
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132 posts_this_year._data_source.append(post)
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133 self._yearly = sorted(self._yearly,
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134 key=lambda e: e.timestamp,
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135 reverse=True)
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diff changeset
136 self._onIteration()
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137 return self._yearly
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138
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139 def _buildMonthlyArchive(self):
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140 if self._monthly is not None:
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141 return self._monthly
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142
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143 self._monthly = []
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144 for fac in self._source.getPageFactories():
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145 post = fac.buildPage()
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146 month = post.datetime.strftime('%B %Y')
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147
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148 posts_this_month = next(
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149 itertools.ifilter(lambda m: m.name == month, self._monthly),
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150 None)
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151 if posts_this_month is None:
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152 timestamp = time.mktime(
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153 (post.datetime.year, post.datetime.month, 1,
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154 0, 0, 0, 0, 0, -1))
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155 posts_this_month = BlogArchiveEntry(self._page, month, timestamp)
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156 self._monthly.append(posts_this_month)
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157
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158 posts_this_month._data_source.append(post)
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159 self._monthly = sorted(self._monthly,
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160 key=lambda e: e.timestamp,
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161 reverse=True)
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162 self._onIteration()
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163 return self._monthly
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164
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165 def _buildTaxonomy(self, tax_name):
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166 if tax_name in self._taxonomies:
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167 return self._taxonomies[tax_name]
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168
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169 posts_by_tax_value = {}
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170 for fac in self._source.getPageFactories():
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171 post = fac.buildPage()
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172 tax_values = post.config.get(tax_name)
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173 if not isinstance(tax_values, list):
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174 tax_values = [tax_values]
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175 for val in tax_values:
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176 posts_by_tax_value.setdefault(val, [])
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177 posts_by_tax_value[val].append(post)
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178
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179 entries = []
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180 for value, ds in posts_by_tax_value.iteritems():
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181 source = ArraySource(self._page.app, ds)
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182 entries.append(BlogTaxonomyEntry(self._page, source, value))
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183 self._taxonomies[tax_name] = sorted(entries, key=lambda k: k.name)
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184
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185 self._onIteration()
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186 return self._taxonomies[tax_name]
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diff changeset
187
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188 def _onIteration(self):
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diff changeset
189 if not self._ctx_set:
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diff changeset
190 eis = self._page.app.env.exec_info_stack
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diff changeset
191 eis.current_page_info.render_ctx.used_source_names.add(
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parents:
diff changeset
192 self._source.name)
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diff changeset
193 self._ctx_set = True
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parents:
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194
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195
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196 class BlogArchiveEntry(object):
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parents:
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197 def __init__(self, page, name, timestamp):
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198 self.name = name
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diff changeset
199 self.timestamp = timestamp
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parents:
diff changeset
200 self._page = page
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201 self._data_source = []
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202 self._iterator = None
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203
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204 def __str__(self):
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205 return self.name
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206
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207 @property
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208 def posts(self):
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diff changeset
209 self._load()
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diff changeset
210 self._iterator.reset()
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parents:
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211 return self._iterator
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parents:
diff changeset
212
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diff changeset
213 def _load(self):
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parents:
diff changeset
214 if self._iterator is not None:
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parents:
diff changeset
215 return
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parents:
diff changeset
216 source = ArraySource(self._page.app, self._data_source)
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diff changeset
217 self._iterator = PageIterator(source, current_page=self._page)
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parents:
diff changeset
218
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parents:
diff changeset
219
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diff changeset
220 class BlogTaxonomyEntry(object):
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parents:
diff changeset
221 def __init__(self, page, source, property_value):
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diff changeset
222 self._page = page
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parents:
diff changeset
223 self._source = source
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diff changeset
224 self._property_value = property_value
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parents:
diff changeset
225 self._iterator = None
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parents:
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226
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parents:
diff changeset
227 def __str__(self):
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diff changeset
228 return self._property_value
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parents:
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229
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parents:
diff changeset
230 @property
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parents:
diff changeset
231 def name(self):
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parents:
diff changeset
232 return self._property_value
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parents:
diff changeset
233
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parents:
diff changeset
234 @property
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parents:
diff changeset
235 def posts(self):
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parents:
diff changeset
236 self._load()
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parents:
diff changeset
237 self._iterator.reset()
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parents:
diff changeset
238 return self._iterator
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parents:
diff changeset
239
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parents:
diff changeset
240 @property
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parents:
diff changeset
241 def post_count(self):
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parents:
diff changeset
242 return self._source.page_count
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parents:
diff changeset
243
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parents:
diff changeset
244 def _load(self):
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parents:
diff changeset
245 if self._iterator is not None:
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parents:
diff changeset
246 return
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parents:
diff changeset
247
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parents:
diff changeset
248 self._iterator = PageIterator(self._source, self._page)
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parents:
diff changeset
249